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Hiall,AJAX加載單個複選框表示udefined上JavaScript驗證
我有簡單的HTML FROM
<form id="adda" name="adda" method="post" action="">
Select Batch :<br/>
<select name="standard" id="standard" onchange="return changestudent(this.value);" >
<option value="0">-Select Batch-</option>
<option value="1">BatchName1</option>
<option value="2">BatchName2</option>
</select>
Students :
<div id="s">
<input type="checkbox" name="sname" value="<?=$raw2['Id']?>" /><?=$raw2['FirstName']?> <?=$raw2['LastName']?><br />
</div>
<input type="button" value="Add" onclick="return val();" style="width:80px; height:28px; color:#8A4E00; background-color:#8bc33f;cursor:pointer;margin-left:10px;" /> <? } ?>
<input type="hidden" name="hsid" id="hsid" value="" />
<input type="hidden" name="sub" id="sub" value="1" />
</form>
下拉的平變化我已被創建AJAX內容稱爲javascript函數changestudent(),顯示的列表那批學生用ckeckboxes。這裏是AJAX功能
<script>
function changestudent(stdid)
{
var strName="Msxml2.XMLHTTP"
if (window.XMLHttpRequest)
{ // Mozilla, Safari, ...
xmlhttp = new XMLHttpRequest();
}
else if (window.ActiveXObject)
{ // IE
xmlhttp = new ActiveXObject("Microsoft.XMLHTTP");
}
xmlhttp.open('GET', 'changestudent.php?stdid='+stdid+'&table=studentdetail', true);
xmlhttp.onreadystatechange = showsub;
xmlhttp.send(null);
}
function showsub()
{
if (xmlhttp.readyState == 4)
{
str = xmlhttp.responseText;
document.getElementById("s").innerHTML = str;
}
}
</script>
我的問題是,當阿賈克斯返回單個複選框javascript函數我用來驗證表單顯示,複選框不確定的。
這裏是我用來驗證表單
<script type="text/javascript">
function val()
{
if(document.adda.standard.value=="0")
{
alert("Please Select Batch");
document.adda.standard.focus();
return false;
}
var cnt = 0;
for(var i = 0;i < document.adda.sname.length;i++)
{
//alert("1");
if(document.adda.sname[i].checked==true)
{
document.adda.hsid.value = document.adda.hsid.value+','+document.adda.sname[i].value;
cnt = cnt+1;
}
}
if(cnt==0)
{
alert("Please Select Student");
return false;
}
document.adda.submit();
任何一個可以幫助我理清了這一點javacript功能?在此先感謝
等待IM編輯代碼它的錯誤 – user3782114
現在檢查我已更正的代碼 – user3782114
它取決於從下拉列表中選擇的值,它顯示undefined當ajax函數返回單個複選框,因爲我上面顯示的HTML表格 – user3782114